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<div class="subTitle">org.apache.commons.math3.random</div>
<h2 title="Class AbstractWell" class="title">Class AbstractWell</h2>
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<li>org.apache.commons.math3.random.AbstractWell</li>
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<dd><a href="http://docs.oracle.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>, <a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></dd>
</dl>
<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../org/apache/commons/math3/random/Well1024a.html" title="class in org.apache.commons.math3.random">Well1024a</a>, <a href="../../../../../org/apache/commons/math3/random/Well19937a.html" title="class in org.apache.commons.math3.random">Well19937a</a>, <a href="../../../../../org/apache/commons/math3/random/Well19937c.html" title="class in org.apache.commons.math3.random">Well19937c</a>, <a href="../../../../../org/apache/commons/math3/random/Well44497a.html" title="class in org.apache.commons.math3.random">Well44497a</a>, <a href="../../../../../org/apache/commons/math3/random/Well44497b.html" title="class in org.apache.commons.math3.random">Well44497b</a>, <a href="../../../../../org/apache/commons/math3/random/Well512a.html" title="class in org.apache.commons.math3.random">Well512a</a></dd>
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<pre>public abstract class <span class="strong">AbstractWell</span>
extends <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</a>
implements <a href="http://docs.oracle.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></pre>
<div class="block">This abstract class implements the WELL class of pseudo-random number generator
 from Fran&ccedil;ois Panneton, Pierre L'Ecuyer and Makoto Matsumoto.

 <p>This generator is described in a paper by Fran&ccedil;ois Panneton,
 Pierre L'Ecuyer and Makoto Matsumoto <a
 href="http://www.iro.umontreal.ca/~lecuyer/myftp/papers/wellrng.pdf">Improved
 Long-Period Generators Based on Linear Recurrences Modulo 2</a> ACM
 Transactions on Mathematical Software, 32, 1 (2006). The errata for the paper
 are in <a href="http://www.iro.umontreal.ca/~lecuyer/myftp/papers/wellrng-errata.txt">wellrng-errata.txt</a>.</p></div>
<dl><dt><span class="strong">Since:</span></dt>
  <dd>2.2</dd>
<dt><span class="strong">Version:</span></dt>
  <dd>$Id: AbstractWell.java 1547633 2013-12-03 23:03:06Z tn $</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="http://www.iro.umontreal.ca/~panneton/WELLRNG.html">WELL Random number generator</a>, 
<a href="../../../../../serialized-form.html#org.apache.commons.math3.random.AbstractWell">Serialized Form</a></dd></dl>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>protected int[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#i1">i1</a></strong></code>
<div class="block">Index indirection table giving for each index the value index + m1 taking table size into account.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected int[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#i2">i2</a></strong></code>
<div class="block">Index indirection table giving for each index the value index + m2 taking table size into account.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected int[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#i3">i3</a></strong></code>
<div class="block">Index indirection table giving for each index the value index + m3 taking table size into account.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#index">index</a></strong></code>
<div class="block">Current index in the bytes pool.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected int[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#iRm1">iRm1</a></strong></code>
<div class="block">Index indirection table giving for each index its predecessor taking table size into account.</div>
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</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected int[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#iRm2">iRm2</a></strong></code>
<div class="block">Index indirection table giving for each index its second predecessor taking table size into account.</div>
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</tr>
<tr class="altColor">
<td class="colFirst"><code>protected int[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#v">v</a></strong></code>
<div class="block">Bytes pool.</div>
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<th class="colFirst" scope="col">Modifier</th>
<th class="colLast" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#AbstractWell(int, int, int, int)">AbstractWell</a></strong>(int&nbsp;k,
            int&nbsp;m1,
            int&nbsp;m2,
            int&nbsp;m3)</code>
<div class="block">Creates a new random number generator.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#AbstractWell(int, int, int, int, int)">AbstractWell</a></strong>(int&nbsp;k,
            int&nbsp;m1,
            int&nbsp;m2,
            int&nbsp;m3,
            int&nbsp;seed)</code>
<div class="block">Creates a new random number generator using a single int seed.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#AbstractWell(int, int, int, int, int[])">AbstractWell</a></strong>(int&nbsp;k,
            int&nbsp;m1,
            int&nbsp;m2,
            int&nbsp;m3,
            int[]&nbsp;seed)</code>
<div class="block">Creates a new random number generator using an int array seed.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#AbstractWell(int, int, int, int, long)">AbstractWell</a></strong>(int&nbsp;k,
            int&nbsp;m1,
            int&nbsp;m2,
            int&nbsp;m3,
            long&nbsp;seed)</code>
<div class="block">Creates a new random number generator using a single long seed.</div>
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<td class="colFirst"><code>protected abstract int</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#next(int)">next</a></strong>(int&nbsp;bits)</code>
<div class="block">Generate next pseudorandom number.</div>
</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#setSeed(int)">setSeed</a></strong>(int&nbsp;seed)</code>
<div class="block">Reinitialize the generator as if just built with the given int seed.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#setSeed(int[])">setSeed</a></strong>(int[]&nbsp;seed)</code>
<div class="block">Reinitialize the generator as if just built with the given int array seed.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractWell.html#setSeed(long)">setSeed</a></strong>(long&nbsp;seed)</code>
<div class="block">Reinitialize the generator as if just built with the given long seed.</div>
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<h3>Methods inherited from class&nbsp;org.apache.commons.math3.random.<a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</a></h3>
<code><a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#clear()">clear</a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextBoolean()">nextBoolean</a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextBytes(byte[])">nextBytes</a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextDouble()">nextDouble</a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextFloat()">nextFloat</a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextGaussian()">nextGaussian</a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextInt()">nextInt</a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextInt(int)">nextInt</a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextLong()">nextLong</a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextLong(long)">nextLong</a></code></li>
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<code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</a></code></li>
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<h4>index</h4>
<pre>protected&nbsp;int index</pre>
<div class="block">Current index in the bytes pool.</div>
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<pre>protected final&nbsp;int[] v</pre>
<div class="block">Bytes pool.</div>
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<pre>protected final&nbsp;int[] iRm1</pre>
<div class="block">Index indirection table giving for each index its predecessor taking table size into account.</div>
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<pre>protected final&nbsp;int[] iRm2</pre>
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<pre>protected final&nbsp;int[] i1</pre>
<div class="block">Index indirection table giving for each index the value index + m1 taking table size into account.</div>
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<pre>protected final&nbsp;int[] i2</pre>
<div class="block">Index indirection table giving for each index the value index + m2 taking table size into account.</div>
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<pre>protected final&nbsp;int[] i3</pre>
<div class="block">Index indirection table giving for each index the value index + m3 taking table size into account.</div>
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<pre>protected&nbsp;AbstractWell(int&nbsp;k,
            int&nbsp;m1,
            int&nbsp;m2,
            int&nbsp;m3)</pre>
<div class="block">Creates a new random number generator.
 <p>The instance is initialized using the current time plus the
 system identity hash code of this instance as the seed.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>k</code> - number of bits in the pool (not necessarily a multiple of 32)</dd><dd><code>m1</code> - first parameter of the algorithm</dd><dd><code>m2</code> - second parameter of the algorithm</dd><dd><code>m3</code> - third parameter of the algorithm</dd></dl>
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<pre>protected&nbsp;AbstractWell(int&nbsp;k,
            int&nbsp;m1,
            int&nbsp;m2,
            int&nbsp;m3,
            int&nbsp;seed)</pre>
<div class="block">Creates a new random number generator using a single int seed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>k</code> - number of bits in the pool (not necessarily a multiple of 32)</dd><dd><code>m1</code> - first parameter of the algorithm</dd><dd><code>m2</code> - second parameter of the algorithm</dd><dd><code>m3</code> - third parameter of the algorithm</dd><dd><code>seed</code> - the initial seed (32 bits integer)</dd></dl>
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<pre>protected&nbsp;AbstractWell(int&nbsp;k,
            int&nbsp;m1,
            int&nbsp;m2,
            int&nbsp;m3,
            int[]&nbsp;seed)</pre>
<div class="block">Creates a new random number generator using an int array seed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>k</code> - number of bits in the pool (not necessarily a multiple of 32)</dd><dd><code>m1</code> - first parameter of the algorithm</dd><dd><code>m2</code> - second parameter of the algorithm</dd><dd><code>m3</code> - third parameter of the algorithm</dd><dd><code>seed</code> - the initial seed (32 bits integers array), if null
 the seed of the generator will be related to the current time</dd></dl>
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<pre>protected&nbsp;AbstractWell(int&nbsp;k,
            int&nbsp;m1,
            int&nbsp;m2,
            int&nbsp;m3,
            long&nbsp;seed)</pre>
<div class="block">Creates a new random number generator using a single long seed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>k</code> - number of bits in the pool (not necessarily a multiple of 32)</dd><dd><code>m1</code> - first parameter of the algorithm</dd><dd><code>m2</code> - second parameter of the algorithm</dd><dd><code>m3</code> - third parameter of the algorithm</dd><dd><code>seed</code> - the initial seed (64 bits integer)</dd></dl>
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<h4>setSeed</h4>
<pre>public&nbsp;void&nbsp;setSeed(int&nbsp;seed)</pre>
<div class="block">Reinitialize the generator as if just built with the given int seed.
 <p>The state of the generator is exactly the same as a new
 generator built with the same seed.</p></div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#setSeed(int)">setSeed</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#setSeed(int)">setSeed</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>seed</code> - the initial seed (32 bits integer)</dd></dl>
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<h4>setSeed</h4>
<pre>public&nbsp;void&nbsp;setSeed(int[]&nbsp;seed)</pre>
<div class="block">Reinitialize the generator as if just built with the given int array seed.
 <p>The state of the generator is exactly the same as a new
 generator built with the same seed.</p></div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#setSeed(int[])">setSeed</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#setSeed(int[])">setSeed</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>seed</code> - the initial seed (32 bits integers array). If null
 the seed of the generator will be the system time plus the system identity
 hash code of the instance.</dd></dl>
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<h4>setSeed</h4>
<pre>public&nbsp;void&nbsp;setSeed(long&nbsp;seed)</pre>
<div class="block">Reinitialize the generator as if just built with the given long seed.
 <p>The state of the generator is exactly the same as a new
 generator built with the same seed.</p></div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#setSeed(long)">setSeed</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#setSeed(long)">setSeed</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>seed</code> - the initial seed (64 bits integer)</dd></dl>
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<h4>next</h4>
<pre>protected abstract&nbsp;int&nbsp;next(int&nbsp;bits)</pre>
<div class="block">Generate next pseudorandom number.
 <p>This method is the core generation algorithm. It is used by all the
 public generation methods for the various primitive types <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextBoolean()"><code>BitsStreamGenerator.nextBoolean()</code></a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextBytes(byte[])"><code>BitsStreamGenerator.nextBytes(byte[])</code></a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextDouble()"><code>BitsStreamGenerator.nextDouble()</code></a>,
 <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextFloat()"><code>BitsStreamGenerator.nextFloat()</code></a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextGaussian()"><code>BitsStreamGenerator.nextGaussian()</code></a>, <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextInt()"><code>BitsStreamGenerator.nextInt()</code></a>,
 <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#next(int)"><code>BitsStreamGenerator.next(int)</code></a> and <a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextLong()"><code>BitsStreamGenerator.nextLong()</code></a>.</p></div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#next(int)">next</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>bits</code> - number of random bits to produce</dd>
<dt><span class="strong">Returns:</span></dt><dd>random bits generated</dd></dl>
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